1. Two doubles were employed for this scene.
   拍这个场面雇用了两个替角。
2. I would like a single/double room.
   我想要一个单/双人间
3. We must always double the sheets before we put them away.
   被单收起来前必须先折叠好。
4. Jack doubled his slice of bread to make a sandwich.
   杰克把面包片折叠起采做成三明治。
5. Marching in double time.
   以快两倍的速度行进

　2个名词解释